Home / 39,043.52-53,880.08-21,138.53

Finding the Fourth Proportional to 39,043.52, 53,880.08 and 21,138.53

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Solution

The fourth proportional to 39,043.52, 53,880.08 and 21,138.53 is: 29,171.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,043.52 : 53,880.08 = 21,138.53 : x
  2. Step 2: Convert to fraction form
    39,043.52/53,880.08 = 21,138.53/x
  3. Step 3: Cross multiply
    39,043.52x = 53,880.08 × 21,138.53
  4. Step 4: Simplify right side
    39,043.52x = 1,138,945,687.48
  5. Step 5: Solve for x
    x = 1,138,945,687.48/39,043.52
  6. Step 6: Final answer
    x = 29,171.18

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.